Help Required ID, 14 century hammered, Crown Prague ?

I got this silver coin amongst a jar full of mixed world coins, it was in a 2x2 plastic holder
Anyone ID it ? I don`t know if it is the correct way up.
A note was fixed to the holder, all I can make out is " Prague > 14c > Crown > Lion Rampant.

TIA I will be back later

I

 

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I have no idea; however, could it be one from Václav II of Bohemia?

 

Thanks, it could be that one or a PRAGUE GROSCHEN like this one http://www.ebay.co.uk/itm/370543126761?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1438.l2649

 

Just reading that written note I think I see the word Groschen